Tìm y:
a) 7 , 25 × y + 5 , 6 = 58
b) 470 , 04 : y = 24
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bài2:Tìm y:
a)y+253=1420 b)y-2316=902
y=1420-253 y=902+2316
y=1167 y=3218
bài3:Tính:
2754:9=306 5089:7=727 3675:5=735 2010:6=335
2754x9=24786 5089x7=35623 3675x5=18375 2010x 6=12060
a) (y + 5) x 2020 = 205 x 2020
(y + 5) x 2020 = 414100
y + 5 = 414100 : 2020 = 205
y = 205 - 5 = 200
a) y= 200
b) y-45600 = 1600 × 4 ×25
y-45600=160000
y= 114400
Tìm y:
\(a,y+847\times2=1953-74\\ y+847\times2=1879\\ y+1694=1897\\ y=1897-1694\\ y=185\\ b,y:\left(7\times18\right)=5839+8591\\ y:126=14430\\ y=14430\times126\\ y=1818180.\)
\(a,\frac{42}{25}:\frac{y}{5}=\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}:\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}\times\frac{5}{6}\)
\(\frac{y}{5}=\frac{7}{5}\)
\(\Leftrightarrow5y=7.5\)
\(5y=35\)
\(y=7\)
a) x + 17,67 = 100 - 63,2 b) x : 7,5 = 3,7 + 4,1 c) 470,04 : x = 24
=> x + 17,67 = 36,8 => x : 7,5 = 7,8 => x = 470,04 : 24
=> x = 36,8 - 17,67 => x = 7,8 x 7,5 => x = 19,585
=> x = 19,13 => x = 58,5
a)
x + 17.67 = 100 - 63.2
x + 17.67 = 36.8
x = 36.8 - 17.67
x = 19.13
b)
x : 7.5 = 3.7 + 4.1
x : 7.5 = 7.8
x = 7.8 x 7.5
x = 58.5
c)
470.04 : x = 24
x = 470.04 : 24
x = 19.585
A)429678
B)KHÔNG TÍNH ĐC BẠN NHÉ!
C)6638,71
D)58,7
E)748
H)21
TÌM X
a)x=3,5
b)13,6
c)19,585
24/y=3/5*8/3
24/y=8/5
24:y=8/5
y=24;8/5
y=15
b,42/25:y/5=6/7
y/5=42/25:6/7
y/5=49/25
y:5=49/25
y=49/25*5
y=49/5=9,8
\(\frac{24}{y}:\frac{8}{3}=\frac{3}{5}\)
\(\Rightarrow\frac{24}{y}=\frac{3}{5}\times\frac{8}{3}\)
\(\Rightarrow\frac{24}{y}=\frac{8}{5}\)
\(\Rightarrow y=\frac{8}{5}\times24=\frac{192}{5}\)
b , \(\frac{42}{25}:\frac{y}{5}=\frac{6}{7}\)
\(\Rightarrow\frac{y}{5}=\frac{6}{7}\times\frac{42}{25}=\frac{36}{25}\)
\(\Rightarrow y=\frac{36}{25}\times5=\frac{36}{5}\)
a) 7 , 25 × y + 5 , 6 = 58
y + 5 , 6 = 58 : 7 , 25
y = 8 − 5 , 6
y = 2 , 4
b) 470 , 04 : y = 24
y = 470 , 04 : 24
y = 19 , 585